FBI agents are not paid in hourly wages, they are paid through the federal government system GS ratings which provides agents an annual salary rating for years served.
The tariff of the United States, like all actual protective tariffs, is partly revenue and partly protective, its original purpose of yielding revenue having been subordinated to that of giving protection, until it may now be best described as a protective tariff yielding incidental revenue.
A tax levied by governments on the value of an imported product is called a tariff or duty. Customs fees are often charged in addition to a tariff. The tariff and other fees are collected at the time a product clears customs in the foreign port. Tariffs increase the cost of your product to the foreign buyer and may affect your competitiveness in the market.